So thin and light, the women's Patagonia Capilene 1 Silkweight Stretch Bottoms feel weightless against your skin when you’re navigating dark canyons or riding perfect spring snow. This is our stretchiest baselayer, and it’s made to keep you cool, dry and moving freely during active pursuits. The fabric is a blend of 5.1-oz 84% polyester and 16% spandex with Gladiodor® odor control for the garment and 50+ UPF sun protection. It rests lightly on the skin, allows a cooling airflow and wicks perspiration to keep you dry. Details include a self-fabric waistband with a soft knit mesh inside for next-to-skin comfort and a gusseted crotch for full range mobility.